Naslov
Nanomechanical cat states generated by a dc voltage-driven Cooper pair box qubit

Autori
Radić, Danko ; Choi, Sang-Jun ; Park, Hee Chul ; Suh, Junho ; Shekhter, Robert I. ; Gorelik, Leonid Y.

Izvornik
Npj Quantum Information (2056-6387) 8 (2022); 74, 5

Vrsta, podvrsta i kategorija rada
Radovi u časopisima, članak, znanstveni

Ključne riječi
Cooper pair box qubit, nanomechanics, cat states

Sažetak
We study a nanoelectromechanical system consisting of a Cooper pair box qubit performing nanomechanical vibrations between two bulk superconductors. We demonstrate that a bias voltage applied to the superconductors may generate states represented by entanglement between qubit states and quantum ’cat states’, i.e. a superposition of the coherent states of the nanomechanical oscillator. We characterize the formation and development of such states in terms of the corresponding Wigner function and entropy of entanglement. Also, we propose an experimentally feasible detection scheme for the effect, in which the average current that attains the specific features created by the entanglement is measured.

Izvorni jezik
Engleski

Znanstvena područja
Fizika

POVEZANOST RADA